Definition of regolith in English:


Pronunciation /ˈreɡəˌliTH/ /ˈrɛɡəˌlɪθ/


  • The layer of unconsolidated rocky material covering bedrock.

    ‘The surface of the Moon is covered by a soil layer called regolith, which has been produced by meteorite impact.’
    • ‘Alteration of the bedrock produces a regolith, the base of which is known as the weathering front.’
    • ‘The Moon's crust is composed of a material known as regolith.’
    • ‘The regolith is a small-grained material resulting from multiple impacts on the moon's surface.’
    • ‘Many images show evidence of a thick loose regolith or gravel/sand/silt layer that could be collected easily by scooping or shoveling.’


Late 19th century from Greek rhēgos ‘rug, blanket’+ -lith.